Gets or sets the element at the specified index.
Assembly: mscorlib (in mscorlib.dll)
The returns an Object, so you may need to cast the returned value to the original type in order to manipulate it. It is important to note that ArrayList is not a strongly-typed collection. For a strongly-typed alternative, see List(T).
ArrayList accepts a null reference (Nothing in Visual Basic) as a valid value and allows duplicate elements.
This property provides the ability to access a specific element in the collection by using the following syntax: myCollection[index].
The C# language uses the this keyword to define the indexers instead of implementing the property. Visual Basic implements as a default property, which provides the same indexing functionality.
Retrieving the value of this property is an O(1) operation; setting the property is also an O(1) operation.
The following code example creates an ArrayList and adds several items. The example demonstrates accessing elements with the property (the indexer in C#), and changing an element by assigning a new value to the property for a specified index. The example also shows that the property cannot be used to access or add elements outside the current size of the list.
The following example uses the property explicitly to assign values to items in the list. The example defines a class that inherits an ArrayList and adds a method to scramble the list items.